Carburetor arrangement



3 1967 J. DE RUGERIS CARBURETOR ARRANGEMENT 2 Sheets-Sheet 1 Filed April 24,. 1964 FIG. 1

FIG.4

FIG.3

INVENTOR. JOHN DeRUGERIS Jan. 31, 1967, DE RUGERIS 3,301,537

CARBURETOR ARRANGEMENT Filed April 24, 1964 2 Sheets-Sheet 2 AOIIIIIIII).

United States Patent Ofiice 3,301,537 Patented Jan. 31, 1967 3,301,537 CARBURETOR ARRANGEMENT John De Rugeris, 527 Kenneth Ave.,

Campbell, Calif. 95008 Filed Apr. 24, 1964, Ser. No. 362,282 4 Claims. (Cl. 261-51) The present invention relates to apparatus known as carburetors which serve to mix vaporized fuel with the air drawn into the cylinders of an internal combustion engine by the action of their pistons, to produce an explosive mixture.

It is an object of my invention to provide a carburetor that may be depended upon to mix the proper amount of fuel with the proper amount of air for producing a combustion mixture of optimum composition, irrespective of the operating condition-s of the engine.

Another object of the invention is to provide a carburetor that operates to effect a most intimate intermingling of the components of the explosive mixture.

These and other objects of my invention will be apparent from the following description of the accompanying drawings which illustrate preferred embodiment thereof and wherein:

FIGURE 1 is a vertical section through a carburetor constructed in accordance with my invention;

FIGURE 2 is a detail view showing part of FIGURE 1 on an enlarged scale;

FIGURE 3 is a plan view of the mixer nozzle comprised in the carburetor shown in FIGURES 1 and 2, and

FIGURE 4 is a bottom plan view of the nozzle.

The carburetor of the invention comprises an open ended tubular housingor enclosure 10. Said enclosure may be formed by two tr-unco-conical shells 12 and 14 which are suitably bolted to each other in a gas tight manner along their diverged end edges so-that the central portion of the enclosure defines a radially expanded region relative to its top'and bottom portions. Through an opening 18 at its upper end the enclosure communicates with the outer atmosphere through a suitable filter so that air may be drawn into the carburetor. The opening 20 at its bottom end leads to the fuel supply manifold of the engine so that the fuel/air mixture formed in the carburetor may be drawn into the cylinders of the engine by the intake strokes of their pistons. sage of air through the'enclosure 10- and hence the inflow of air from the outside through the opening 18 is controlled by a throttle valve 22 of conventional design which may be provided near the lower end of the enclosure. Said valve may be formed by a circular lid or disk 24 that is secured to a spindle 26 which extends diagonally across and is rotatably supported in the walls of the enclosure near its bottom end. During operation of the engine, the lid is opened to varying degrees to permit the required amount of air to be drawn through the carburetor by the intake .strokes of the engine pistons. Opening of the throttle valve 22 is effected through a suitable linkage partially indicated at 28, by depression of the accelerator pedal which controls the speed of operation of internal combustion engines. When the engine is in operation, a fuel supply pump of conventional design which is actuated by the operating engine, delivers fuel through a conduit 30 radially through the wall of enclosure 10 into a fuel metering valve 32 that is located near the upper end of the enclosure 10 in coaxial alignment therewith and is provided with a mixer nozzle 34. The valve 32 is arranged to dispense controlled amounts of the fuel depending upon the requirements of the engine for best performance under varying conditions, and its nozzle 34 is constructed in such a manner as effect a The pasmost intimate intermingling of the dispensed 'fuel and the air sucked through the enclosure by the intake strokes of the pistons of the engine.

The valve 32 comprises a tubular body portion 36 that forms an internal chamber 38 to which the conduit 30 delivers the fuel through a pressure control valve which is schematically indicated at 40 and which maintains the pressure within the chamber 38 at a constant value. From said chamber cont-rolled amounts of the fuel may enter a fuel distributing chamber 42 formed in the center of the mixer nozzle 34. The nozzle 34 has an externally threaded tubular neck 44 that may be engaged within the internally threaded lower end of the tubular valve body 36. Threadably received within said neck is a plug 46 that is provided with an orifice or aperture 48 which forms the valve seat. Received within said aperture is the pointed end 49 of a control rod 50 that passes through the tubular valve body 36 coaxially therewith and is slidable relative thereto. By means of a spring 52 said rod 50 is yieldably held in a position wherein its pointed end 49 closes the orifice 48. The spring 52 is coiled about the rod 50 within the chamber 38 and is compressed between the ceiling of said chamber and an annular flange 54 provided around the rod 50 near its pointed end. The upper end of the rod 50 protrudes upwardly from the body of the valve 36 and is pivotally connected by a suitable interponent 56 to one end of a two armed lever 58. The lever 58 turns upon a pin 60 which is supported from the wall of the enclosure 10 near its upper end. The other end of lever 58 is pivotally connected by an elongated link 62 to an arm 64 that is secured to the spindle 26 of the throttle valve 22 at the lower end of the enclosure 10. When the throttle valve is in the closed position illustrated in solid lines in FIGURE 1, the spring 52 holds the control rod 50 in a position therein its pointed end blocks the orifice 48 of the valve 32 so that none of the fuel delivered into valve chamber 38 may pass into the fuel distributing chamber 42 of the nozzle 34. When the operator steps on the accelerator pedal, however, and swings the throttlerdisk 24 into an open position, such as shown in FIGURE 2, the rotation of spindle 26 is effective through link 62 to lift the valve control rod 50 against the urgency of spring 52. Thus, its pointed end is withdrawn from the orifice 48 of the valve 32 tovarying degrees dependent upon the rotational posi tion of the throttledisk 24. Hence, the. amount of fuel delivered into. the chamber 42. of the mixer nozzle 34 for distribution by said nozzle into the interior of the enclosure 10, is related to the position of the throttle valve '22.which in turn controls the amount of air drawn through the carburetor housing 10.

In accordance with the invention the mixer nozzle 34 is constructed in such a manner as to effect a most intimate mixing of the dispensed fuel with the air passing through the enclosure 10. The body'of the mixer nozzle has the shape of a circular disk or wheel and the hereinbefore described fuel distributing chamber 42 is located in the hub of the wheel and is closed at the bottom. Arranged concentrically around the hub of the wheel is a plurality of air conducting pasages 66 (FIG. 3). Said passages extend from angularly equi-spaced air intake Openings 68 provided in an intermediately located-annular area of the upper surface of wheel 34 in a direction tangentially of an (imaginary) circle that is concentric with the disk and is of smaller diameter than the circle determined by the center points of said intake openings 68 outwardly toward angularly equi-spaced outlet openings 70 located in the peripheral area of the bottom surface of said wheel 34. The passages 66 are preferably arranged to taper slightly in the direction from their intake openings 68 towards their outlet openings 70 so that the latter are actually smaller than the former (FIG. 3). From the fuel distribution chamber 42 within the wheel-shaped body of the nozzle 34 fuel supply channels 72 of very small diameter radiate in the manner of the spokes of a wheel toward the air conducting passages 66 and terminate in minute apertures on the inner sectors of said passages adjacent their outlet openings 70 (FIG. 4).

As best shown in FIGURE 1, the valve 32 and its nozzle 34 are located near the upper converged end of enclosure whereat its upper trunco-conical shell 12 forms a cylindrical neck 74. Above the upper surface of the nozzle 34 said neck 74 forms an inner downwardly converging tunnelling surface 76 that guides the air drawn into and through the enclosure 10 by the suction strokes of the engine pistons, against the upper surface of the nozzle 34.

During operation of the device, the butterfly valve 22 is open so that air is drawn through-the enclosure 10 and the needle point 49 of the fuel supply valve 32 is withdrawn from the orifice 48 of the valve seat 46 so that metered amounts of the fuel may reach the chamber 42 of nozzle 34 where they break into fine streams that pass through the radially directed channels 72 into the air supply passages 66 adjacent the discharge ends 70* thereof. The air sucked through the enclosure 10 is guided by the funnelling surface 76 in the neck 74 of enclosure 10 into the tapering passages 66. Due to their taper these passages conduct the air with increasing speed and while subjecting it progressively to lateral compression in many separate currents over the discharge orifices of the radially directed fuel supply channels 72. In passing over said orifices, these currents of air entrain the thin streams of fuel emerging from said channels 72 and the resultant air and fuel mixture issues in many downwardly slanted tangentially directed jets into the low pressure area that is established below the bottom surface of the nozzle 34 by the radially expanded center portion 16 of enclosure 10. As a result an expanding cyclon of intermingled atomized fuel and air is formed in said portion 16 of the enclosure, and as the mixture is swept downwardly into the converging lower portion 14 of the enclosure and passes through the narrow neck 20 at the bottom end thereof, the resultant reco-mpression of the swirling intermingled mist of fuel and air produces a most thorough mixture of the named components that is delivered into the cylinders of the engine by the suction stroke of the engine pistons. As a result the efiiciency of combustion in the cylinders of the engine is improved providing improved performance of the engine and increased power output combined with greater economy in fuel consumption.

While I have explained my invention with the aid of a particular embodiment thereof, it will be understood that the invention is not limited to the specific constructional details shown and described which may be departed from, without departing from the scope and spirit of the invention.

I claim:

1. A carburetor arrangement for internal combustion engines comprising a tubular enclosure having a relatively narrow upper end portion and an expanded portion below said upper end portion; arranged within said enclosure in said upper end portion thereof a fuel supply valve having a tubular body portion and secured to said body portion a mixer nozzle in the form of a disk of a larger diameter than the diameter of said body portion and containing a fuel distribution chamber in communication with the interior of said body portion, said disk having a plurality of air-conducting passages commencing with intake openings on the upper surface of said disk and extending in a tangential direction to outlet openings provided in a peripheral area of said disk above said expanded enclosure portion, and fuel distributing channels extending from said fuel distribution chamber into said air-conducting passages; adjustable means for controlling the flow of air through said enclosure, adjustable means for controlling the flow of fuel from the interior of said tubular valve body to said fuel distribution chamber, and means coupling said air flow control means and said fuel flow control means for operation in synchronism.

2. A carburetor arrangement for internal combustion engines comprising a tubular enclosure having a relatively narrow upper end portion and a radially expanded portion below said upper end portion; coaxially arranged within said enclosure in said upper end portion thereof a fuel supply valve having a tubular body portion and secured to said body portion a mixer nozzle in the form of a circular disk of a larger diameter than the diameter of said body portion and containing a centrally located fuel distribution chamber in communication with the interior of said body portion, said disk having a plurality of air-conducting passages commencing with intake openings on the upper surface of said disk and extending in a downwardly slanted tangential direction to outlet openings provided in the bottom surface of said disk and arranged to discharge into said radially expanded portion of said enclosure, and fuel distributing channels extending from said fuel distribution chamber to points in said air-conducting passages adjacent said outlet openings thereof, adjustable means for controlling the flow of air through said enclosure, adjustable means for controlling the flow of fuel from the interior of said tubular valve body to said fuel distribution chamber, means for coupling said air flow control means and said fuel flow control means for operation in synchronism, and means on the upper end portion of said enclosure for directing air entering said enclosure through said upper end portion toward the intake openings of said air conducting passages.

3. A carburetor arrangement for internal combustion engines comprising a tubular enclosure, coaxially arranged within said enclosure a fuel supply valve having a tubular body portion and secured to said body portion a mixer nozzle in the form of a circular disk containing a centrally located fuel distribution chamber in communication with the interior of said tubular body portion, said disk having a plurality of air-conducting passages commencing with air-intake openings arranged in the upper surface of said disk and extending in a downwardly slanted tangential direction to outlet openings located along the peripheral area of the bottom surface of said disk, and fuel distributing channels extending from said fuel distribution chamber radially to points in said air-conducting passages adjacent said outlet openings thereof; adjustable means for controlling the flow of air through said enclosure, adjustable means for controlling the flow of fuel from the interior of said tubular valve body to said fuel distribution chamber and means coupling said air flow control means and said fuel flow control means for operation in synchronism.

4. A carburetor arrangement for internal combustion engines comprising a tubular enclosure having relatively narow upper and lower end portions and a center portion radially expanded relative to said end portions; coaxially arranged within said enclosure in said upper end portion thereof a fuel supply valve having a tubular body portion and secured to the bottom end of said body portion a mixer nozzle in the form of a circular disk of a larger diameter than the diameter of said body portion and containing a centrally located fuel distribution chamber in communication with the interior of said tubular body portion, said disk having a plurality of air-conducting passages commencing with angularly equi-spaced air intake openings arranged along an intermediately located annular area of the upper surface of said disk and extending in a downwardly slanted tangential direction to angularly equi-spaced outlet openings located along the peripheral area of the bottom surface of said disk and arranged to discharge into said radially expanded center portion of said enclosure, and a plurality of fuel distributing channels extending from said fuel distribution chamber radially to points in said air-conducting passages adjacent said outlet openings thereof; adjustable means for controlling the flow of air through said enclosure, adjustable means for controlling the flow of fuel from the interior of said tubular valve body to said fuel distribution chamber, means mechanically coupling said air flow control means and said fuel flow control means for operation in synchronis-m, and a tunnelling surface at the upper end portion of said enclosure arranged to direct air entering said enclosure through said upper end portion thereof toward the intake openings of said air-conducting passages.

References Cited by the Examiner UNITED STATES PATENTS Stewart 26-150 Heath 261-50 Jacoby et al 26 151 X Bernstein et al. 26 1--51 X DeGuyon 261--5 1 Starkey et a1. 2394-03 X 10 HARRY B. THORNTON, Primary Examiner.

T. R. MILES, Assistant Examiner. 

1. A CARBURETOR ARRANGEMENT FOR INTERNAL COMBUSTION ENGINES COMPRISING A TUBULAR ENCLOSURE HAVING A RELATIVELY NARROW UPPER END PORTION AND AN EXPANDED PORTION BELOW SAID UPPER END PORTION; ARRANGED WITHIN SAID ENCLOSURE IN SAID UPPER END PORTION THEREOF A FUEL SUPPLY VALVE HAVING A TUBULAR BODY PORTION AND SECURED TO SAID BODY PORTION A MIXER NOZZLE IN THE FORM OF A DISK OF A LARGER DIAMETER THAN THE DIAMETER OF SAID BODY PORTION AND CONTAINING A FUEL DISTRIBUTION CHAMBER IN COMMUNICATION WITH THE INTERIOR OF SAID BODY PORTION, SAID DISK HAVING A PLURALITY OF AIR-CONDUCTING PASSAGES COMMENCING WITH INTAKE OPENINGS ON THE UPPER SURFACE OF SAID DISK AND EXTENDING IN A TANGENTIAL DIRECTION TO OUTLET OPENINGS PROVIDED IN A PERIPHERAL AREA OF SAID DISK ABOVE SAID EXPANDED ENCLOSURE PORTION, AND FUEL DISTRIBUTING CHANNELS EXTENDING FROM SAID FUEL DISTRIBUTION CHAMBER INTO SAID AIR-CONDUCTING PASSAGES; ADJUSTABLE MEANS FOR CONTROLLING THE FLOW OF AIR 